Get the flag-reason catalog used by the flagging dropdown. With review_site_id it returns a flat array of that site's reasons; without it, the full catalog grouped by review site.

Auth: Both — authentication. The endpoint applies no store/role scoping; the catalog is global and identical for any authenticated partner or account user.

Rate limit: No rate limit.

Request

• Query: review_site_id (integer, optional) — when present, limit reasons to that single review site (flat array). When you omit it, return all reasons grouped by site.

Response — { data. } envelope.

When you give review_site_id — data is an array of ReviewSiteFlagReason rows:

• id (integer) — reason row id.
• reason_identifier (string) — short reason code.
• reason (string) — long platform-defined description.

When omitted — data is an array of per-site groups:

• review_site_id (integer) — site id.
• review_site_name (string|null) — site name (from reviewSite.name).
• reasons (array) — objects of { id, reason_identifier, reason }.